Mounting system for telecommunications distribution elements

ABSTRACT

A mounting system (700/900) for locking two pieces of telecommunications equipment (610/810) to prevent relative sliding therebetween and relative separation therebetween in a direction generally perpendicular to the direction of the relative sliding includes a first locking feature (701/901) defined by a stud (702/902) with a stem portion (708/908) and a flange portion (710/910) having a larger profile than the stem portion (708/908) and a second locking feature (703/903) defined by a slot (704/904) with a receiver portion (712/912) and a retention portion (714/914). The receiver portion (712/912) is sized to accommodate the flange portion (710/910) of the stud (702/902) and the retention portion (714/914) is sized to accommodate the stem portion (708/908) but not the flange portion (710/910) of the stud (702/902). A third locking feature (705/905) prevents relative sliding between the two pieces of telecommunications equipment (610/810) once the stud stem portion (708/908) has been slid within the slot retention portion (714/914) and the stud flange portion (710/910) is out of alignment with the slot receiver portion (712/912).

CROSS REFERENCE TO RELATED APPLICATIONS

-   -   The present application is a Continuation of U.S. patent        application Ser. No. 16/416,499, filed on May 20, 2019, now U.S.        Pat. No. 10,830,977, which is a Continuation of U.S. patent        application Ser. No. 15/822,936, filed on Nov. 27, 2017, now        U.S. Pat. No. 10,295,774, which is a Continuation of U.S. patent        application Ser. No. 15/030,332, filed on Apr. 18, 2016, now        U.S. Pat. No. 9,829,642, which is a National Stage of        PCT/EP2014/071899, filed on Oct. 13, 2014, which claims benefit        of U.S. Provisional Application Ser. No. 61/892,860, filed on        Oct. 18, 2013, and 61/986,629, filed on Apr. 30, 2014, which        applications are incorporated herein by reference in their        entirety. To the extent appropriate, a claim of priority is made        to each of the above disclosed applications.

FIELD OF THE INVENTION

The present invention relates to telecommunications distributionsystems, e.g., optical fiber distribution systems, which may include arack and elements which populate the rack, wherein such fiber opticelements can include fiber terminations, patching, fiber splitters, andfiber splices. More specifically, the present invention relates to amounting system for fixedly stacking two or more such telecommunicationsdistribution elements along a vertical column or stack.

BACKGROUND OF THE INVENTION

Optical fiber distribution systems may include fiber terminations andother equipment which is typically rack mounted. Various concerns existfor the optical fiber distribution systems, including density, ease ofuse and mounting, and cable management. There is a continuing need forimprovements in the telecommunications distribution area, especiallyoptical fiber distribution area.

SUMMARY OF THE INVENTION

One implementation of a system in accordance with the examples of thedisclosure includes a building block element mountable to a rack orother structure. The element includes a chassis, and a moveable tray.The tray is moveably mounted to chassis with a slide mechanism thatallows the tray to slide relative to the chassis, wherein the tray mayhouse equipment for fiber terminations, patching, splitting, andsplicing.

The elements can be stacked in a column with each tray slidable in ahorizontal direction. In the case of a column of elements, a selectedtray is pulled outward to access the desired tray.

In an example embodiment of a fiber optic distribution element, one sideof each element can be for patch cables, and the opposite side can befor cable termination of an incoming cable, such as a distribution cableor a feeder cable. The elements can be configured as desired and formbuilding blocks for an optical fiber distribution system (ODF). When theelements are mounted in a column in a rack, the cables can be placed invertical cable guides to enter and exit the selected element. An examplerack may be front accessible. However, the elements shown and describedcan be used in other racks, frames, cabinets or boxes including inarrangements where rear access is desirable or useful.

According to an aspect of the disclosure, the disclosure is directed toa mounting system for fixedly stacking two or more suchtelecommunications elements along a vertical column or stack, whereinthe stacked elements can then be mounted on further fixtures such asracks, frames, cabinets or boxes.

According to another aspect, the present disclosure relates to amounting system for locking two pieces of telecommunications equipmentso as to prevent relative sliding between the two pieces oftelecommunications equipment and relative separation between the twopieces of telecommunications equipment that is in a direction generallyperpendicular to the direction of the relative sliding. The mountingsystem includes a first locking feature in the form of a stud defining astem portion and a flange portion having a larger profile than the stemportion, a second locking feature in the form of a slot defining areceiver portion and a retention portion, wherein the receiver portionis sized to accommodate the flange portion of the stud and the retentionportion is sized to accommodate the stem portion but not the flangeportion of the stud, and a third locking feature configured to preventrelative sliding between the two pieces of telecommunications equipmentonce the stem portion of the stud has been slid through the retentionportion of the slot and the flange portion is out of alignment with thereceiver portion of the slot. According to one example embodiment, thethird locking feature may be provided in the form of a removable,snap-fit structure. According to another example embodiment, the thirdlocking feature may be provided in the form of a cantilever arm that isan integral part of the telecommunications equipment, the cantilever armhaving a portion that abuts the stud for preventing sliding movement ofthe stud.

According to another aspect, the disclosure is directed to atelecommunications distribution element that includes a mounting systemthat allows the distribution element to be fixedly stacked along avertical column or stack with another similarly configured element.

According to another aspect, the disclosure is directed to an opticalfiber distribution element comprising a top surface, a bottom surface,an interior region defined between the top surface and the bottomsurface, the interior region including fiber optic connection locations,a first locking feature in the form of a stud extending from the topsurface, the stud defining a stem portion and a flange portion having alarger profile than the stem portion, and a second locking feature inthe form of a slot at the bottom surface, the slot defining a receiverportion and a retention portion, wherein the receiver portion is sizedto accommodate the flange portion of the stud and the retention portionis sized to accommodate the stem portion but not the flange portion ofthe stud.

According to another aspect of the disclosure, the disclosure isdirected to a method of stacking two or more distribution elements alonga vertical column.

According to another aspect, the disclosure is directed to a method oflocking two pieces of telecommunications equipment so as to preventrelative sliding between the two pieces of telecommunications equipmentand relative separation between the two pieces of telecommunicationsequipment that is in a direction generally perpendicular to thedirection of the relative sliding. The method includes aligning a flangeportion of a stud of a first piece of telecommunications equipment witha receiver portion of a slot of a second piece of telecommunicationsequipment, passing the flange portion of the stud through the receiverportion of the slot, sliding a stem portion of the stud through aretention portion of the slot to bring the flange portion out ofalignment with the receiver portion of the slot, and providing a lockthat prevents relative sliding between the first and second pieces oftelecommunications equipment so as to prevent sliding of the stemportion of the stud through the retention portion of the slot.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an embodiment of an optical fiber distribution element inaccordance with the present disclosure;

FIG. 2 is a top view of the element of FIG. 1;

FIG. 3 is a perspective view of the element of FIG. 1 showing the traypulled forward from the chassis;

FIG. 4 shows one of tray frame members pivoted upwardly from the tray;

FIG. 5 shows a second frame member pivoted upwardly relative to thetray;

FIG. 6 shows a portion of a cable management area of the element of FIG.1;

FIG. 7 shows a similar view to FIG. 6, with one of the frame memberspivoted upwardly;

FIG. 8 shows an alternative embodiment of an element with differentcable management at the entry points;

FIG. 9 shows three of the elements of FIG. 8 mounted in a blockformation, with cable radius limiters at the entry point mounted in analternative position;

FIG. 10 is a perspective view of the block of FIG. 9;

FIG. 11 is a view of the block of FIG. 9, with the tray of the middleelement pulled forward for access to the fiber terminations;

FIG. 12 shows an enlarged portion of an entry point for one of theelements with a cable radius limiter in a first position;

FIG. 13 shows a similar view as in FIG. 12, with the cable radiuslimiter positioned in an alternate position;

FIG. 14 shows an exploded view of a cable mount;

FIG. 15 shows an element with a cable mount on one side, and a cableradius limiter on an opposite side;

FIG. 16 shows an alternative cable mount;

FIGS. 17-29 show various views of the elements shown in FIGS. 1-16including additional details and cable routings shown for illustrationpurposes;

FIG. 30 shows an alternative embodiment of a block of two alternativeelements;

FIG. 31 shows a tray pulled forward from the chassis of one of theelements of the block of FIG. 30;

FIG. 32 shows the tray extended forward as in the view of FIG. 31, withone of the frame members pivoted upwardly;

FIG. 33 is a view similar to the view of FIG. 32, with a second framemember pivoted upwardly;

FIG. 34 shows a block including two elements;

FIG. 35 shows an exploded view of the two elements of the block of FIG.34;

FIG. 36 shows a single element;

FIG. 37 shows an exploded view of the element of FIG. 36;

FIG. 38 shows the element of FIG. 37, without the top cover;

FIG. 39 is a top view of the element of FIG. 38;

FIG. 40 is an alternative view of the element of FIG. 38, showingalternative devices at the cable entry points;

FIG. 41 is a top view of the element of FIG. 40;

FIG. 42 shows an alternative embodiment of an element in a top view withan alternative synchronized movement feature;

FIG. 43 is a perspective view of the element of FIG. 42;

FIGS. 44 and 45 show movement of the various components of thesynchronized movement feature of FIGS. 42 and 43;

FIGS. 46 and 47 show an element with an alternative radius limiter atthe cable entry and exit locations;

FIG. 48 shows a cross-sectional view of a portion of a universalmounting mechanism configured for mounting an optical fiber distributionelement similar to those shown in FIGS. 30-47 of the present disclosureto a telecommunications rack, the mounting mechanism shown in a lockedposition;

FIG. 49 illustrates the universal mounting mechanism of FIG. 48 in anunlocked position;

FIG. 50 illustrates a partially exploded perspective view of a portionof the universal mounting mechanism of FIGS. 48-49 being used on anoptical fiber distribution element similar to the elements shown inFIGS. 30-47;

FIG. 51 illustrates the universal mounting mechanism of FIG. 50 with theuniversal mounting brackets of the mechanism mounted to the element ofFIG. 50;

FIG. 51A is a close-up view of a portion of the universal mountingmechanism of FIG. 51, illustrating the locking spring in a lockedposition with respect to the universal mounting bracket;

FIG. 52 is a cross-sectional view of a portion of the universal mountingmechanism of FIG. 48 showing the positional relationship between theuniversal mounting bracket and the release handle of the mountingmechanism when the mounting mechanism is in a locked state;

FIG. 53 shows a pair of elements in a stacked configuration, theelements shown with another alternative radius limiter on the slidemechanism;

FIG. 54 is a top view of one of the elements of FIG. 50 illustrating thealternative radius limiter;

FIGS. 55-59 illustrate the steps for stacking two telecommunicationsdistribution elements in a vertical stack or column using the mountingsystem of the present disclosure;

FIG. 60 is a bottom perspective view of one of the telecommunicationsdistribution elements of FIGS. 55-59, illustrating the slots of themounting system;

FIG. 61 is a bottom plan view of the telecommunications distributionelement of FIG. 60;

FIGS. 62-63 illustrate the steps for stacking two telecommunicationsdistribution elements in a vertical stack or column using anotherembodiment of a mounting system according to the present disclosure;

FIG. 64 is a cross-section taken along line 64-64 of FIG. 63;

FIG. 65 illustrates a portion of the cross-section of FIG. 64 from adirect side-view;

FIG. 66 illustrates the element of FIGS. 62-65 with the tray at anextended position, the element including pivotable covers over theU-shaped radius limiter and the S-shaped cable pathway within theelement, the covers shown in an open configuration;

FIG. 67 illustrates the element of FIG. 66 with the covers in apivotally closed position; and

FIGS. 68-79 illustrate various embodiments of hingedly-mountable framemembers that may be used within the trays of the element of FIGS. 62-67.

DETAILED DESCRIPTION

Referring now to FIGS. 1-16, various embodiments of an optical fiberdistribution element 10, or element 10, are shown. The elements 10 canbe individually mounted as desired to telecommunications equipmentincluding racks, frames, or cabinets. The elements 10 can be mounted ingroups or blocks 12 which forms a stacked arrangement. In oneembodiment, a vertical stack of elements 10 populates an optical fiberdistribution rack.

Each element 10 holds fiber terminations, or other fiber componentsincluding fiber splitters and/or fiber splices. In the case of fiberterminations, incoming cables are connected to outgoing cables throughconnectorized cable ends which are connected by adapters, as will bedescribed below.

Each element includes a chassis 20 and a movable tray 24. Tray 24 ismovable with a slide mechanism 30 including one or more gears 32 and aset of two toothed racks or linear members 34.

Slide mechanism 30 provides for synchronized movement for managing thecables extending to and from tray 24. Entry points 36 on either side ofchassis 20 allow for fixation of the input and output cables associatedwith each element 10. The radius limiters 38 associated with each slidemechanism 30 move in synchronized movement relative to chassis 20 andtray 24 to maintain fiber slack, without causing fibers to be bent,pinched, or pulled.

Each tray 24 includes mounting structure 50 defining one or more offiber terminations, fiber splitters, fiber splices, or other fibercomponents. As shown, mounting structure 50 holds adapters 52 whichallow for interconnection of two connectorized ends of cables. Each tray24 includes one or more frame members 56. In the example shown, twoframe members 56 are provided. As illustrated, each frame member 56 isT-shaped. Also, each tray 24 includes two frame members 56 which arehingedly mounted at hinges 58. A top frame member 62 is positioned abovea bottom frame member 64. The mounting structure 50 associated with eachframe member 62, 64 includes one or more integrally formed adapterblocks 70. Adapter blocks 70 include a plurality of adapter ports forinterconnecting to fiber optic connectors. A pathway 76 defines agenerally S-shape from radius limiters 38 to adapter blocks 70. Asshown, pathway 76 includes an upper level 78 and a lower level 80 in theinterior. A portion 84 of pathway 76 is positioned adjacent to hinges 58to avoid potentially damaging cable pull during pivoting movement offrame members 56. Flanges 86 and radius limiters 90 help maintain cablesin pathways 76.

Tray 24 includes openings 96 to allow for technician access to the cableterminations at adapter blocks 70. In addition, the T-shapes of framemembers 56 further facilitate technician access to the connectors.

Cables extending to and from element 10 can be affixed with a cablemount 100 as desired. Additional protection of the fiber breakouts canbe handled with cable wraps 102. Radius limiters 106 can be additionallyused to support and protect the cables.

The wrap 102 shown in FIG. 16 is mounted horizontally to the tray 24wherein both the front and rear ends of the wrap are mounted tohorizontal mounts at similar horizontal planes. However, in otherembodiments, where the wrap needs to be mounted to mounts that are atdifferent planes or at planes that are perpendicular to each other, thewrap may be flexible enough to be able to be twisted around itslongitudinal axis. As such, the front and the rear ends of the wrap maybe mounted to mounts that are at perpendicular planes to each other andstill not violate minimum bending requirements for the cables as thetrays are moved back and forth with respect to the elements. Such wrapsmay be used on all of the embodiments of the elements discussed herein.

Referring now to FIGS. 17-29, various examples of cable routings areillustrated for element 10.

If desired, more than one feeder cable can supply cabling to more thanone element 10.

Referring now to FIGS. 30-41, various additional embodiments of elements210 are shown. Element 210 includes a chassis 220 in a movable tray 224mounted with a slide mechanism 230 which promotes synchronized movementof radius limiters 238. Each tray 224 includes two hingedly mountedframe members 256. Each frame member 256 has a middle portion 260separated by openings 262 from side portions 264. Middle portion 260 canhold fiber terminations. Side portions 264 include radius limiters 270.Cover 266 goes over tray 224. Latches 268 latch tray 224 to cover 266 inthe closed position.

A pathway 276 extends from either side from tray 224 to supply cables toeach of trays 224. An upper level 278 and a lower level 280 supply therespective frame members 256 with cabling. A general S-shaped pathway276 is defined wherein the pathway 276 passes close to hinges 258.

A dovetail 288 is used to hold cable mounts 286 and radius limiters 284.

An opening 290 in tray 224 allows for connector access by thetechnician. Similarly, openings 262 on each frame member 256 allow fortechnician access to the individual connectors.

To form a block 292 of plural elements 210, bars 294 and fasteners 296are used. Bars 294 give a small spacing between each element 210.

Referring now to FIGS. 42-45, an alternative slide mechanism 330 isshown in alternative element 310. Slide mechanism 330 allows formovement of the trays and related radius limiters and synchronizedmovement similar to slide mechanism 30, 230. Alternative slide mechanism330 includes two wheels 332 and two wires 334, 336. The wheels 332 arelocated on second part 342. The wires are looped in opposite directionsand are connected to the first part 340 and the third part 344.

Referring now to FIGS. 46 and 47, an alternative radius limiter 420 isshown on alternative element 410. Radius limiter 420 includes frictionmembers 430 which limit the amount of sliding movement of cables passingthrough radius limiter 420, to assist with cable management. Frictionmembers 430 include flexible fingers which press lightly on the cablesin radius limiter 420 to reduce or eliminate sliding movement of thecables in the radius limiter 420.

Referring now to FIGS. 48-52, a universal mounting mechanism 500 forreleasably mounting a telecommunications chassis to a telecommunicationsfixture, such as an optical fiber distribution rack, is illustrated. InFIGS. 48-52, the universal mounting mechanism 500 is shown as havingbeen adapted for and being used on an optical fiber distribution element510 having features similar to those elements 210, 410 shown in FIGS.30-47 of the present disclosure. With the universal mounting mechanism500 of FIGS. 48-52, telecommunications chassis or elements such aselements 210, 410, and 510 can be mounted as desired totelecommunications fixtures or equipment such as racks, frames, orcabinets.

It should be noted that although the universal mounting mechanism 500 ofthe present disclosure has been shown as being used on a piece oftelecommunications equipment such as the optical fiber distributionelement 510 (which has similar features to those elements 210 and 410 ofFIGS. 30-47), the optical fiber distribution element 510 is simply oneexample of telecommunications equipment or chassis on which the mountingmechanism 500 may be used for mounting to equipment such astelecommunications racks, frames, or cabinets. For use with theuniversal mounting mechanism 500 of FIGS. 48-52, the element 510 hasbeen adapted to receive certain portions of the mounting mechanism 500.However, it should be understood that the mounting mechanism 500 of thepresent disclosure includes features having inventive aspects inisolation and can be used on other types of optical fiber distributionelements as long as the elements or chassis thereof are adapted toreceive portions of the mounting mechanism 500.

Still referring to FIGS. 48-52, the universal mounting mechanism 500will now be described in further detail.

FIG. 48 shows a cross-sectional view of a portion of the universalmounting mechanism 500, wherein the mounting mechanism 500 is in alocked state or position. FIG. 49 illustrates the universal mountingmechanism 500 in an unlocked position. FIG. 50 illustrates a partiallyexploded perspective view of a portion of the universal mountingmechanism 500 being used with the optical fiber distribution element510, which is similar to the elements 210, 410 shown in FIGS. 30-47, asnoted above. FIG. 51 illustrates the universal mounting mechanism 500with the universal mounting brackets 502 of the mechanism 500 mounted tothe element 510. FIG. 51A is a close-up view of a portion of theuniversal mounting mechanism 500, illustrating a locking spring 504 ofthe mechanism 500 in a locked position with respect to the universalmounting bracket 502 of the mechanism 500. FIG. 52 is a cross-sectionalview of a portion of the universal mounting mechanism 500 showing thepositional relationship between the universal mounting bracket 502 and arelease handle 506 of the mounting mechanism 500 when the mechanism 500is in a locked state.

The universal mounting mechanism 500 generally includes the right andleft universal mounting brackets 502, release handles 506 for each ofthe mounting brackets 502, a cover 508 for each of the mounting brackets502, and the locking spring 504 for each of the mounting brackets 502.

In the depicted embodiment, each of the universal mounting brackets 502is designed for mounting two stacked elements 510. Thus, each of theright and left mounting brackets 502 includes two latch openings 512adjacent the front 514 of the mounting bracket 502 (one for each element510) and upper and lower mounting tabs 516 at the rear 518 of thebracket 502.

In the given embodiment, the mounting tabs 516 at the rear 518 of themounting brackets 502 are designed to slidably mount the brackets 502 tofixtures such as telecommunications racks along a sideway or lateraldirection. As such, in mounting elements 510 to a rack, the universalmounting brackets 502 are initially slid into openings provided on therack using the mounting tabs 516. Once the brackets 502 are secured on arack, the elements 510 can be slid onto the brackets 502 in a slidingfashion, as will be described in further detail. The latch openings 512of the brackets 502 are, then, used to lock the elements 510 in place.

In using the universal mounting mechanism 500 of the present disclosure,each element 510, on each of the right and left sides thereof, defines abracket channel 520. The channel 520 is configured to slidably receivethe front portions 514 of the mounting brackets 502. The cover 508closes the bracket channel 520 to the exterior of each element 510. Thecover 508 defines a deflection ramp 522 at the inner face thereof, thepurpose of which will be discussed in further detail below. The lockingspring 504 is mounted to each element 510 such that an end portion 524of the locking spring 504 can flex in and out of the latch opening 512of the universal mounting bracket 502. As shown in the cross-sectionalviews of FIGS. 48 and 49 and in FIGS. 51 and 51A, the end portion 524 ofthe locking spring 504 defines a perpendicular locking face 526 and anangular insertion face 528. When an element 510 is initially beingslidably mounted on the mounting bracket 502, the angled insertion face528 rides over the front end 530 of the front portion 514 of themounting bracket 502 until the end portion 524 of the locking spring 504flexibly snaps into the latch opening 512.

The element 510, at this point, is prevented from being pulled outforwardly. The locking spring 504 abuts an inner front face 532 definedby the latch opening 512 of the mounting bracket 502 to prevent removalof the chassis from a rack.

The release handle 506 is positioned between the locking spring 504 andthe cover 508. The release handle 506 has a grip portion 534 for pullingthe release handle 506 forwardly to release the chassis for removal fromthe mounting brackets 502. The release handle 506 also defines adeflection tab 536 at the rear end 538. The deflection tab 536 isconfigured to ride over the deflection ramp 522 of the cover 508 whenthe grip portion 534 is pulled forwardly. The interaction of thedeflection tab 536 and the deflection ramp 522 causes lateral inwardmovement of the deflection tab 536, which in turn, pushes the spring 504laterally inwardly, clearing the end portion 524 of the locking spring504 from the latch opening 512. In this manner, when the release handle506 is pulled forwardly, the interaction of the deflection tab 536 andthe deflection ramp 522 causes the release of the spring 504, and thusthe entire element 510, from the mounting bracket 502. The chassis andthe entire element 510 can be pulled forwardly from the mounting bracket502.

In using the universal mounting mechanism 500 on the element 510, a trayof the element 510 has to be pulled from its chassis to allow enoughroom for gripping the release handle 506 as seen in FIG. 52, to pull itforwardly. In initially mounting the element 510 to a rack using theuniversal mounting mechanism 500, the release handle 506 has to beeither pushed rearwardly by the user to allow the spring 504 to bepositioned in its locking position or the user can simply push a tray ofthe element 510 rearwardly to contact the grip portion 534 of therelease handle 506 to push the release handle 506 rearwardly. Thus, whenthe element 510 is mounted to a rack using the universal mountingmechanism 500, the release handle 506 must be in its rearward positionto allow the spring 504 to be in its locking position. Otherwise, if therelease handle 506 is in its forward position, the element 510 cansimply slide out of the brackets 502.

The release handle 506 defines a positive stop 540 that is configured toabut a stop face 542 defined by a portion of a slide mechanism 544within the element 510. The abutment of the stop 540 with the stop face542 prevents further forward pulling of the release handle 506.

The universal mounting mechanism 500 includes a design that may beretrofitted on a number of telecommunications chassis. As long as abracket channel 520 is provided in the chassis and the chassis includesenough spacing on the sides thereof for receiving a locking spring 504,a release handle 506, and a cover 508 for interacting with the releasehandle 506 and closing the mounting mechanism 500 to the exterior of thechassis, the universal mounting mechanism 500 can be utilized on anygiven chassis.

Also, as noted above, the rear portion 518 of the mounting brackets 502may be modified to fit different types of mounting configurations ondifferent types of telecommunications racks, frames, or cabinets. Themounting arrangement of the brackets 502 of the present disclosure thatutilizes the tabs 516 for lateral slide-locking is simply one example ofa mounting arrangement. Also, even though the mounting mechanism 500 ofthe present disclosure has been shown with mounting brackets 502 thatcan accommodate two vertically stacked elements 510, the mountingbrackets 502 can be modified to receive other number of chassis,including a single chassis per bracket 502.

In the given embodiment, the locking spring 504 is fixed to the chassiswith fasteners 545, allowing the end portion 524 of the locking spring504 to be flexible. Other fixing methods may be used for the lockingspring 504 in other types of telecommunications equipment.

Referring now to FIGS. 53 and 54, an alternative radius limiter 638 isshown on the slide mechanisms of alternative elements 610. Elements 610are generally similar in construction and function to those of theelements discussed previously. Radius limiter 638 defines a generallyU-shaped configuration that leads cables from and to the element 610while preserving minimum bend radius requirements.

The U-shaped radius limiter 638 defines an inner end 621 and an outerend 623 and a divider 625 extending from adjacent the inner end 621 toadjacent the outer end 623. The outer end 623 of the radius limiter 638cooperates with a cable guide 684 that is mounted to the chassis 620 ofthe element 610 for leading cables to and from the tray 624 of theelement 610.

The divider 625 of the radius limiter 638 forms two separate troughs627, 629 for the radius limiter 638. The two troughs 627, 629 isolateand separate the cables (e.g., coming in and going out) of the element610 into two distinct paths. According to one example cable routingconfiguration, the two troughs 627, 629 may guide the cables to theupper and lower levels 678, 680 defined toward the rear of the tray 624while maintaining the S-shaped pathway 676 created within the element610. The divider 625 of the radius limiter 638 includes a plurality ofcable management tabs 631 mounted thereon for retaining the cableswithin the troughs 627, 629. A similar tab 633 is also found at the rearof the tray 624 for retaining the cables that are being lead to theupper and lower levels 678, 680. The tabs 631 and 633 may be removable,snap-on structures.

The tabs 631 and 633 cooperate with additional cable management fingers635 defined both on the radius limiter 638 and toward the rear of thetray 624 in retaining the cables within the S-shaped pathway 676.

Referring now to FIGS. 55-61, a mounting system 700 for fixedly stackingtwo or more telecommunications elements in a vertical column or stack isillustrated. In FIGS. 55-61, the mounting system 700 of the presentdisclosure is illustrated as being used to stack elements havingfeatures similar to those elements 610 shown in FIGS. 53-54.

It should be noted that although the mounting system 700 of the presentdisclosure has been shown as being used on a piece of telecommunicationsequipment such as the optical fiber distribution element 610 (which hassimilar features to those elements 10, 210, 410, and 510 of FIGS. 1-52),the optical fiber distribution element 610 is simply one example oftelecommunications equipment on which the mounting system 700 may beused for fixedly stacking such elements for further mounting toequipment such as telecommunications racks, frames, or cabinets. As willbe discussed in further detail below, the element 610 has beenconfigured specifically to incorporate certain aspects of the mountingsystem 700. However, it should be understood that the mounting system700 of the present disclosure includes features having inventive aspectsin isolation and can be used on other types of optical fiberdistribution elements as long as the elements or chassis thereof areadapted to incorporate aspects of the mounting system 700. According tocertain embodiments of the disclosure, the mounting system 700 of thepresent disclosure may be used as a retro-fit solution on pre-existingtelecommunications equipment by modifying certain aspects of thepreexisting equipment to incorporate features of the system 700, as willbe apparent from the following description.

Still referring to FIGS. 55-61, the mounting system 700 will now bedescribed in further detail. FIGS. 55-59 illustrate the steps forstacking two of the elements 610 in a vertical stack or column using themounting system 700 of the present disclosure. FIG. 60 is a bottomperspective view of one of the elements 610 of FIGS. 55-59 and FIG. 61is a bottom plan view of the element 610 of FIG. 60.

According to an example embodiment, the mounting system 700 includes afirst locking feature 701 in the form of at least one stud 702 (e.g., aplurality of studs 702 as depicted) that is provided at a top surface690 of an element 610 and a second locking feature 703 in the form of atleast one slot 704 (e.g., a plurality of slots 704 as depicted) that isprovided at a bottom surface 692 of an element 610. According to anexample embodiment, to improve manufacturing efficiency andstandardization, an element 610 may include both the studs 702 at itstop surface 690 and the slots 704 at its bottom surface 692. Thus, whenstacking similarly configured elements 610, the studs 702 that arelocated at the top surface 690 of an element 610 can cooperate with theslots 704 that are located at the bottom surface 692 of an adjacentelement that is to be stacked vertically with the first element 610.

In addition to the studs 702 and slots 704 which cooperate to partiallyfix the elements 610 together, the mounting system 700 of the presentinvention also includes a third locking feature 705 in the form of aremovably mounted slide lock 706. As will be described in further detailbelow, the slide lock 706 is configured to prevent two stacked elements610 from relatively sliding along the horizontal direction so as toprevent removal of the studs 702 from the slots 704, and, thus,separation of the two elements 610.

Still referring to FIGS. 55-61, in the depicted embodiment, the studs702 are located along both the right side 694 and the left side 696 ofthe element 610. Similarly, as shown in FIGS. 60 and 61, the slots 704are also positioned on the right and left sides 694, 696 of the element610 so as to align and cooperate with the studs 702 of an adjacentelement 610 for using the mounting system 700.

Each stud 702 includes a stem portion 708 and a flange portion 710. Eachslot 704 includes a receiver portion 712 and a retention portion 714.The receiver portion 712 is sized to accommodate the flange portion 710of the stud 702. Once the flange portion 710 of a stud 702 has beeninserted through the receiver portion 712 of a slot 704, the stemportion 708 of the stud 702 slides through the retention portion 714until the flange portion 710 of the stud 702 is positioned above theretention portion 714. Further advancement of a stud 702 within a slot704 is prevented due to the abutment of the stem portion 708 of the stud702 with an end 716 of the retention portion 714 of the slot 704 thatacts as a positive stop.

In this manner, once the flange portion 710 of a stud 702 has beenpositioned above the retention portion 714 of a slot 704, the stud 702cannot be separated from the slot 704 along a direction perpendicular tothe sliding direction.

As shown in FIG. 55, when stacking two elements 610 together, theelements 610 are initially aligned to position the flange portions 710of the studs 702 of a bottom element 610 with the receiver portions 712of the slots 704 of an upper element 610. As shown in FIGS. 56 and 57,after the elements 610 are brought together, the elements 610 are slidwith respect to each other. In the depicted embodiment, the upperelement 610 is slid rearwardly with respect to the bottom element 610.This movement results in the stem portions 708 of the studs 702 slidingthrough the retention portions 714 of the slots 704 and bringing theflange portions 710 of the studs 702 over the retention portions 714 ofthe slots 704. When the stem portion 708 finally abuts the positive stopdefined by the end 716 of the slot 704 and the relative sliding of theelements 610 is completed, separation in the vertical direction isprevented. Separation of the two elements 610, at this point, requires areversal of the steps used in fixing the two elements 610. Forseparation, the stem portions 708 of the studs 702 have to be slidthrough the retention portions 714 of the slots 704 until the flangeportions 710 are aligned with the receiver portions 712 of the slots704. And, at that point, the two elements 610 can be separated from eachother along a vertical direction perpendicular to the sliding direction.

Since separation of the two elements 610, after they have been fixed viathe studs 702 and the slots 704, requires reverse relative horizontalmovement between the elements 610, the mounting system 700 of thepresent disclosure further includes the slide lock 706 noted above andshown in FIGS. 58 and 59. The slide lock 706 is configured to preventtwo stacked elements 610 from sliding along the horizontal directionwith respect to each other such that the studs 702 cannot be removedfrom the slots 704.

As shown in FIG. 60, each element 610 has been provided with specificfeatures to utilize the slide lock 706. In the example shown in FIG. 60,each element 610 defines a cutout 718 at a lower side edge 720 thereof(i.e., lower cutout 718) at both the right and left sides 694, 696 ofthe element 610 and a cutout 722 at an upper side edge 724 thereof(i.e., upper cutout 722) at both the right and left sides 694, 696 ofthe element 610. The upper cutouts 722 are configured to align with andcooperate with the lower cutouts 718 when two elements 610 are stackedin order to use the slide lock 706 to prevent separation of the elements610. Again, as noted above, each element 610 may be provided with bothan upper cutout 722 and a lower cutout 718 for manufacturing efficiencyand standardization of the parts.

It should be noted that although the depicted example of the mountingsystem 700 utilizes a slide lock 706 on both the right and left sides694, 696 of an element stack, a slide lock 706 can be used on a singleside of the stack if desired. Also, it should be noted that although thedepicted example of the mounting system 700 utilizes a single slide lock706 on each of the right and left sides 694, 696 of an element stack,more slide locks 706 can be used if desired.

Referring specifically now to a lower cutout 718 of an element 610, thecutout 718 defines both a bottom notch 726 and a side notch 728. Theupper cutout 722 defines both a top notch 730 and a side notch 732. Thecutouts 718, 722 are configured such that when the lower cutout 718 ofan upper element 610 aligns with the upper cutout 722 of a lower element610, an opening 734 is created between the two elements 610. The opening734 is created by the alignment of the bottom notch 726 of a lowercutout 718 and the top notch 730 of an upper cutout 722.

The slide lock 706 is inserted into the opening 734 and prevents anyhorizontal movement between two stacked elements 610. The slide lock706, according to the depicted embodiment, is a removable snap-fitstructure that includes a flexible cantilever tab 736. The flexiblecantilever tab 736 provides a frictional fit against the top and bottomnotches 730, 726 of the upper and lower cutouts 722, 718, respectively,and can be flexed back toward the center of the slide lock 706 inremoving the slide lock 706.

The side notches 732, 728 of the upper and lower cutouts 722, 718 alsoalign when the elements 610 are moved into position. The side notches732, 728 accommodate a user's fingers for accessing the slide lock 706for either insertion or removal.

Thus, the mounting system 700 of the present disclosure provides aquick-attach solution that can be used in stacking elements 610 in acolumn for further mounting to equipment such as telecommunicationsracks, frames, or cabinets. The mounting system 700 of the presentdisclosure provides an unobtrusive attachment solution that can beincorporated in a variety of telecommunications distribution elementdesigns. The mounting system 700 of the present disclosure may be usedas a retro-fit solution on pre-existing telecommunications equipmentwith slight modification to certain aspects of the preexisting equipmentto incorporate features of the system.

The mounting system 700 may be used to mount or stack two or moreelements (such as the optical fiber distribution elements 610) that havesimilar configurations.

The mounting system 700 may also be used to mount or stack dissimilarequipment together if those pieces of equipment include features of thesystem 700 that allow them to intermate. For example, elements includingequipment other than optical distribution features may be mounted tooptical distribution elements such as elements 610 using the system 700of the present disclosure as long as those equipment are configured withfeatures of the system 700 that allow them to intermate with thefeatures of equipment such as elements 610.

The mounting or stacking system 700 of the present disclosure may beused in instances where a single element includes features for mountingthat element to a telecommunications rack, frame, or cabinet and otherelements may be stacked with respect to that element using the system700. For example, as shown in the example version of the element 510 inFIGS. 48-52, an element or chassis may include a universal quick-connectmounting mechanism similar to mechanism 500 of FIGS. 48-52 includinguniversal mounting brackets 502 for releasably mounting that element orchassis to a telecommunications fixture, such as an optical fiberdistribution rack. Using the stacking system 700 of the presentdisclosure, only one of the elements that are to be mounted to aseparate fixture such as a rack would need to have the structure forutilizing a mechanism such as the universal mounting mechanism 500. Therest of the elements could be stacked with respect to that element byusing the mounting or stacking system 700 of the present disclosure thatrelatively fixes the elements and prevents relative sliding between theelements and relative separation between the elements in a directiongenerally perpendicular to the direction of the relative sliding.

The element utilizing the mounting features (such as the universalquick-connect mechanism 500 shown in FIGS. 48-52) for mounting to aseparate telecommunications fixture may be located at the top of thestack, at the bottom of the stack, or in the middle of the stack usingthe features of the stacking system 700 of the present disclosure.

Referring now to FIGS. 62-65, another embodiment of a mounting system900 for fixedly stacking two or more telecommunications elements in avertical column or stack is illustrated. In FIGS. 62-65, the mountingsystem 900 of the present disclosure is illustrated as being used tostack elements 810 having features similar to those elements 610 shownin FIGS. 53-61.

It should be noted that although the mounting system 900 of the presentdisclosure has been shown as being used on a piece of telecommunicationsequipment such as the optical fiber distribution element 810 (which hassimilar features to those elements 10, 210, 410, 510, and 610 of FIGS.1-61), the optical fiber distribution element 810 is simply one exampleof telecommunications equipment on which the mounting system 900 may beused for fixedly stacking such elements for further mounting toequipment such as telecommunications racks, frames, or cabinets. As willbe discussed in further detail below, the element 810 has beenconfigured specifically to incorporate certain aspects of the mountingsystem 900. However, it should be understood that the mounting system900 of the present disclosure includes features having inventive aspectsin isolation and can be used on other types of optical fiberdistribution elements as long as the elements or chassis thereof areadapted to incorporate aspects of the mounting system 900. According tocertain embodiments of the disclosure, the mounting system 900 of thepresent disclosure may be used as a retro-fit solution on pre-existingtelecommunications equipment by modifying certain aspects of thepreexisting equipment to incorporate features of the system 900, as willbe apparent from the following description.

Still referring to FIGS. 62-65, the mounting system 900 will now bedescribed in further detail. FIGS. 62-63 illustrate the steps forstacking two of the elements 810 in a vertical stack or column using themounting system 900 of the present disclosure. FIG. 64 is across-section taken along line 64-64 of FIG. 63, and FIG. 65 illustratesa portion of the cross-section of FIG. 64 from a direct side view.

According to an example embodiment, the mounting system 900 includes afirst locking feature 901 in the form of at least one stud 902 (e.g., aplurality of studs 902 as depicted) that is provided at a top surface890 of an element 810 and a second locking feature 903 in the form of atleast one slot 904 (e.g., a plurality of slots 904 as depicted) that isprovided at a bottom surface 892 of an element 810. According to anexample embodiment, to improve manufacturing efficiency andstandardization, an element 810 may include both the studs 902 at itstop surface 890 and the slots 904 at its bottom surface 892. Thus, whenstacking similarly configured elements 810, the studs 902 that arelocated at the top surface 890 of an element 810 can cooperate with theslots 904 that are located at the bottom surface 892 of an adjacentelement that is to be stacked vertically with the first element 810. Itshould be noted that slots 904 are similar in configuration to slots 704that are shown at the bottom of the element 610 in FIGS. 60-61.

In addition to the studs 902 and slots 904 which cooperate to partiallyfix the elements 810 together, the mounting system 900 of the presentinvention also includes a third locking feature 905 in the form of aslide lock 906. As will be described in further detail below, the slidelock 906 is configured to prevent two stacked elements 810 fromrelatively sliding along the horizontal direction so as to preventremoval of the studs 902 from the slots 904, and, thus, separation ofthe two elements 810.

Still referring to FIGS. 62-65, in the depicted embodiment, the studs902 are located along both the right side 894 and the left side 896 ofthe element 810. Similarly, the slots 904 are also positioned on theright and left sides 894, 896 of the element 810 so as to align andcooperate with the studs 902 of an adjacent element 810 for using themounting system 900.

Each stud 902 includes a stem portion 908 and a flange portion 910. Eachslot 904 includes a receiver portion 912 and a retention portion 914.The receiver portion 912 is sized to accommodate the flange portion 910of the stud 902. Once the flange portion 910 of a stud 902 has beeninserted through the receiver portion 912 of a slot 904, the stemportion 908 of the stud 902 slides through the retention portion 914until the flange portion 910 of the stud 902 is positioned above theretention portion 914. Further advancement of a stud 902 within a slot904 is prevented due to the abutment of the stem portion 908 of the stud902 with an end surface 916 defined by the retention portion 914 of theslot 904 that acts as a positive stop.

In this manner, once the flange portion 910 of a stud 902 has beenpositioned above the retention portion 914 of a slot 904, the stud 902cannot be separated from the slot 904 along a direction perpendicular tothe sliding direction.

As shown in FIG. 62, when stacking two elements 810 together, theelements 810 are initially aligned to position the flange portions 910of the studs 902 of a bottom element 810 with the receiver portions 912of the slots 904 of an upper element 810. As shown in FIGS. 63 and 64,after the elements 810 are brought together, the elements 810 are slidwith respect to each other. In the depicted embodiment, the upperelement 810 can be slid rearwardly with respect to the bottom element810 or the bottom element 810 can be slid forwardly with respect to theupper element 810. This movement results in the stem portions 908 of thestuds 902 sliding through the retention portions 914 of the slots 904and bringing the flange portions 910 of the studs 902 over the retentionportions 914 of the slots 904. When the stem portion 908 finally abutsthe positive stop defined by the end surface 916 of the slot 904 and therelative sliding of the elements 810 is completed, separation in thevertical direction is prevented. Separation of the two elements 810, atthis point, requires a reversal of the steps used in fixing the twoelements 810. For separation, the stem portions 908 of the studs 902have to be slid through the retention portions 914 of the slots 904until the flange portions 910 are aligned with the receiver portions 912of the slots 904. And, at that point, the two elements 810 can beseparated from each other along a vertical direction perpendicular tothe sliding direction.

Since separation of the two elements 810, after they have been fixed viathe studs 902 and the slots 904, requires reverse relative horizontalmovement between the elements 810, the mounting system 900 of thepresent disclosure further includes the slide lock 906 noted above andshown in FIGS. 65 and 66. The slide lock 906 is configured to preventtwo stacked elements 810 from sliding along the horizontal directionwith respect to each other such that the studs 902 cannot be removedfrom the slots 904.

As shown in FIGS. 64 and 65, each element 810 has been provided withspecific features to utilize the slide lock 906. In the example shown inFIGS. 62-65, the slide lock 906 is defined by a cantilever arm 918. Thecantilever arm 918 defines a stop surface 920, at least a portion ofwhich is configured to abut the stud 902 and prevent the stud 902 fromsliding horizontally from the retention portion 914 to the receiverportion 912 of the slot 904. The stop surface 920 captures the stud 902against the end surface 916.

As shown in FIGS. 64-65, at least a portion of the cantilever arm 918(i.e., the portion that defines the stop surface 920) communicates withthe retention portion 914 of the slot 904. In this manner, the portionof the cantilever arm 918 that communicates with the retention portion914 of the slot 904 can abut the stud 902 and prevent the stud 902 fromsliding.

As also shown in FIGS. 64-65, the cantilever arm 918 defines a taperedflex surface 922 that is configured to facilitate flexing of thecantilever arm 918 elastically upwardly as the stud 902 is slid from thereceiver portion 912 of the slot 904 toward the retention portion 914 ofthe slot 904. The flex surface 922 tapers downwardly as it extends in adirection from the back to the front of the element 810. The flexsurface 922 intersects the stop surface 920 of the cantilever arm 918 todefine a lower front edge 924. In order to horizontally move the stud902 from the retention portion 914 to the receiver portion 912 of theslot 904, the edge 924 has to be cleared by the flange portion 910 ofthe stud 902. This may be accomplished by flexing the cantilever arm 918elastically upwardly in order to pass the flange portion 910 of the stud902 thereunder.

In should be noted that a slide lock 906 in the form of a cantilever arm918 may be provided at one or more of the slots 904 found on theelements 810. In certain embodiments, each slot 904 may include acantilever arm 918 communicating therewith for providing the slide lock906. In the example depicted in FIGS. 64-65, only two of the three slots904 on each side of the element include the cantilever arm 918.

It should also be noted that although the depicted example of themounting system 900 utilizes a slide lock 906 on both the right and leftsides 894, 896 of an element stack, a slide lock 906 can be used on asingle side of the stack if desired. However, using a slide lock 906 onboth sides 894, 896 of the element stack may provide more stability tothe locking mechanism.

Thus, the mounting system 900 of the present disclosure, similar to thelocking system 700, provides a quick-attach solution that can be used instacking elements 810 in a column for further mounting to equipment suchas telecommunications racks, frames, or cabinets. The mounting system900 of the present disclosure provides an unobtrusive attachmentsolution that can be incorporated in a variety of telecommunicationsdistribution element designs. The mounting system 900 of the presentdisclosure may be used as a retro-fit solution on pre-existingtelecommunications equipment with slight modification to certain aspectsof the preexisting equipment to incorporate features of the system.

The mounting system 900 may be used to mount or stack two or moreelements (such as the optical fiber distribution elements 810) that havesimilar configurations.

The mounting system 900 may also be used to mount or stack dissimilarequipment together if those pieces of equipment include features of thesystem 900 that allow them to intermate. For example, elements includingequipment other than optical distribution features may be mounted tooptical distribution elements such as elements 810 using the system 900of the present disclosure as long as that equipment is configured withfeatures of the system 900 that allow them to intermate with thefeatures of equipment such as elements 810.

The mounting or stacking system 900 of the present disclosure may beused in instances where a single element includes features for mountingthat element to a telecommunications rack, frame, or cabinet and otherelements may be stacked with respect to that element using the system900. For example, as shown in the example version of the element 510 inFIGS. 48-52, an element or chassis may include a universal quick-connectmounting mechanism similar to mechanism 500 of FIGS. 48-52 includinguniversal mounting brackets 502 for releasably mounting that element orchassis to a telecommunications fixture, such as an optical fiberdistribution rack. Using the stacking system 900 of the presentdisclosure, only one of the elements that are to be mounted to aseparate fixture such as a rack would need to have the structure forutilizing a mechanism such as the universal mounting mechanism 500. Therest of the elements could be stacked with respect to that element byusing the mounting or stacking system 900 of the present disclosure thatrelatively fixes the elements and prevents relative sliding between theelements and relative separation between the elements in a directiongenerally perpendicular to the direction of the relative sliding.

The element utilizing the mounting features (such as the universalquick-connect mechanism 500 shown in FIGS. 48-52) for mounting to aseparate telecommunications fixture may be located at the top of thestack, at the bottom of the stack, or in the middle of the stack usingthe features of the stacking system 900 of the present disclosure.

Referring now to FIGS. 66-67, the element 810 of FIGS. 62-65 is shownwith the tray 824 of the element 810 at an extended position toillustrate some of the internal features of the element 810. As shown,in FIG. 66, the tray 824 is illustrated empty without any frame members,and in FIG. 67, the tray 824 is illustrated populated with framemembers, one of which is further illustrated in further detail inisolation in FIG. 79. As will be discussed, the tray 824 of element 810may be used with a variety of different versions of frame members,examples of which will be discussed in further detail below.

Still referring to FIGS. 66-67, the element 810 includes a firstpivotable snap-fit cover 811 over a U-shaped radius limiter 838 that ison the slide mechanism of the element 810. The U-shaped radius limiter838 includes features similar to radius limiter 638 shown in FIGS.53-54. The element 810 further includes a second pivotable snap-fitcover 813 over a rear portion 815 of the S-shaped cable pathway 876defined within the tray 824 of the element 810. The covers 811, 813 areshown in an open configuration in FIG. 66 and shown in a closedconfiguration in FIG. 67.

The S-shaped pathway 876, similar to the embodiment of the element 610discussed previously, is divided into two separate troughs 827, 829 by adivider 825 that is toward the rear of the tray. According to an examplecable routing configuration, the two troughs 827, 829 may guide thecables to upper and lower levels 878, 880 defined toward the rear of thetray 824 while maintaining the S-shaped pathway 876 created within theelement 810. The covers 811, 813 help retain cables within the S-shapedpathway 876 defined within the tray 824 as the cables lead to and fromthe radius limiter 838 to the tray 824 within element 810. Thepivotability aspect of the covers 811, 813 facilitates initial placementof the cables within the S-shaped pathway 876 and provides access to thecables for removal. As shown, the covers 811, 813 may also includeapertures 821 for viewing the cables within the S-shaped pathway 876from an exterior of the tray 824 when the covers 811, 813 are closed.

Referring now to FIGS. 68-79, as noted above, various hingedly mountableframe members that may be used within the trays 824 of the elements 810are illustrated. Each of the frame members in FIGS. 68-79 is illustratedin isolation removed from the tray 824 of the element 810. In FIG. 67,discussed previously, the tray 824 is shown populated with framemembers, one of which is illustrated in isolation in further detail inFIG. 79.

Similar to the earlier embodiments of the elements, each tray 824 ofelement 810 may include two frame members in a stacked arrangement,wherein the frame members are hingedly mounted at hinges 858. A topframe member is normally positioned above a bottom frame member. Asdiscussed previously, the S-shaped pathway 876 includes an upper level878 and a lower level 880 in the interior. The upper level 878 isconfigured to supply an upper frame member, and the lower level 880 isconfigured to supply a lower frame member that is positioned below theupper frame member. The trays cooperate with the frame members indefining openings for guiding the cables to the specified frame members.

A portion 884 of the S-shaped pathway 876 is positioned adjacent tohinges 858 to avoid potentially damaging cable pull during pivotingmovement of frame members.

Similar to previously discussed trays, each tray 824 of element 810includes openings 897 to allow for technician access to the cableterminations within the tray 824. Furthermore, as will be discussed infurther detail, most of the embodiments of the frame members that areconfigured to be used within the tray 824 of element 810 include amiddle portion that is separated by openings from side portions, similarto the frame members discussed previously, for allowing connector accessto the technicians.

Referring now to FIG. 68, an embodiment of a frame member 956 that canbe used with the tray 824 of element 810 is illustrated in isolation.Each frame member 956 has a middle portion 960 separated by openings 962from side portions 964. Middle portion 960 can hold fiber terminationsin the form of fiber optic adapters that can receive fiber opticconnectors. Side portions 964 include radius limiters 970. The framemember 956 may include openings 957 at a rear portion thereof forallowing cables to be routed from an upper frame member 956 to a lowerframe member 956. Such openings 957 adjacent the hinges of the framemembers can be used on other frame members of the present application.

Referring now to FIG. 69, another embodiment of a frame member 1056 thatcan be used with the tray 824 of element is illustrated in isolation.Frame member 1056 is configured to hold fiber terminations in the formof fiber optic connectors that are different in format than thosereceived by the frame member 956 of FIG. 68.

Referring now to FIG. 70, an embodiment of a frame member 1156 that issimilar in configuration to the frame member 956 of FIG. 68 isillustrated. The middle portion 1160 of frame member 1156 can hold fiberterminations in the form of fiber optic adapter blocks.

Referring now to FIGS. 71-72, another embodiment of a frame member 1256that can be used with the tray 824 of element 810 is illustrated inisolation. Frame member 1256 is configured to hold fiber terminations inthe form of fiber optic adapters that can receive fiber optic connectorsat a center portion 1260 of the frame member 1256. The front portion1261 of the frame member 1256 includes splice regions 1263 for splicingof fiber optic cables. A cover 1265 may be used to cover the spliceregions 1263.

Referring now to FIG. 73, another embodiment of a frame member 1356 thatcan be used with the tray 824 of element 810 is illustrated inisolation. Frame member 1356 defines a plurality of individuallypivotable flip-trays 1357 that can support fiber optic equipment in theform of fiber terminations such as fiber optic connectors and otherfiber optic equipment such as splitters 1387. Radius limiters 1359 inthe form of spools are positioned at both the right side 1361 and theleft side 1363 of each flip-tray 1357.

FIG. 74 illustrates a frame member 1456 that is similar in constructionto the frame member 1356 of FIG. 73. Frame member 1456 defines spliceregions 1458 at the center portion 1460 of the individual flip-trays1457 between the radius limiters 1459, in addition to fiber opticsplitters 1387.

FIG. 75 illustrates a base portion 1556 for a frame member that can beused to mount different modular elements for changing the configurationor the layout of the fiber optic connectivity within the frame member.The base portion 1556 has a middle portion 1560 separated by openings1562 from side portions 1564. Middle portion 1560 can hold fiberterminations in the form of fiber optic adapters that can receive fiberoptic connectors. The side portions 1564 are configured to receivedifferent modular elements for varying the layout of a frame member. Themodular elements can be mounted to the side portions 1564 via snap-fitinterlocks. For example, the base portion 1556 is shown in FIG. 76 witha pair of modular elements 1569 that are configured to provide a layoutthat is similar in configuration to that of the frame member 956 of FIG.68, wherein the modular elements 1569 define radius limiters 1570.

FIG. 77 illustrates the snap-fit feature of the modular elements 1569 ina cross-sectional view. According to the depicted example, the modularelements 1569 may include a plurality of hooks 1590 on a first side 1591for catching against a first edge 1592 defined by one of the sideportions 1564. The modular elements 1569 may include a plurality ofelastically flexible snap-fit catches 1593 on an opposing second side1594 for catching against an opposing second edge 1595 defined by theside portions 1564. In this manner, using the hooks 1590 and catches1593, the modular elements 1569 can be mounted to the side portions 1564with a snap-fit and removed therefrom to allow changing the layout of aframe member.

FIG. 78 illustrates an embodiment of a frame member 1656 that includesone of the modular elements 1569 of FIGS. 76-77 and another modularelement 1669 defining a splice region 1671. FIG. 79 illustrates a framemember 1756 that has been formed by snap-fitting two modular elements1669 that include splice regions 1671 to the base portion 1556. A pairof the frame members 1756 can be seen in the tray 824 of element 810 ofFIG. 67 as discussed previously.

PARTS LIST

-   10 element-   12 block-   20 chassis-   24 tray-   30 slide mechanism-   32 gears-   34 rack-   36 entry points-   38 radius limiters-   50 mounting structure-   52 adapters-   56 T-shaped frame member-   58 hinge-   62 top frame member-   64 bottom frame member-   70 adapter blocks-   72 connectors-   74 cables-   76 pathway-   78 upper level-   80 lower level-   84 portion-   86 flanges-   90 radius limiters-   96 openings-   100 cable mount-   102 cable wrap-   106 radius limiters-   210 element-   220 chassis-   224 tray-   230 slide mechanism-   238 radius limiters-   256 frame members-   258 hinges-   260 middle portion-   262 openings-   264 side portions-   266 cover-   268 latches-   270 radius limiters-   276 pathway-   278 upper level-   280 lower level-   284 radius limiters-   286 cable mounts-   288 dovetail-   290 opening-   292 block-   294 bar-   296 fasteners-   310 element-   330 slide mechanism-   332 wheels-   334 wire-   336 wire-   340 first part-   342 second part-   344 third part-   410 element-   420 radius limiter-   430 friction members-   500 universal mounting mechanism-   502 universal mounting bracket-   504 locking spring-   506 release handle-   508 cover-   510 element-   512 latch openings-   514 front portion of the mounting bracket-   516 mounting tabs-   518 rear portion of the mounting bracket-   520 bracket channel-   522 deflection ramp-   524 end portion of the locking spring-   526 perpendicular locking face-   528 angular insertion face-   530 front end-   532 inner front face-   534 grip portion-   536 deflection tab-   538 rear end of the release handle-   540 positive stop-   542 stop face-   544 slide mechanism-   545 fasteners-   610 element-   620 chassis-   621 inner end of radius limiter-   623 outer end of radius limiter-   624 tray-   625 divider-   627 trough-   629 trough-   631 cable management tab-   633 cable management tab-   635 cable management finger-   638 radius limiter-   676 pathway-   678 upper level-   680 lower level-   684 cable guide-   690 top surface of an element-   692 bottom surface of an element-   694 right side-   696 left side-   700 mounting system-   701 first locking feature-   702 stud-   703 second locking feature-   704 slot-   705 third locking feature-   706 slide lock-   708 stem portion-   710 flange portion-   712 receiver portion-   714 retention portion-   716 end-   718 lower cutout-   720 lower side edge-   722 upper cutout-   724 upper side edge-   726 bottom notch of lower cutout-   728 side notch of lower cutout-   730 top botch of upper cutout-   732 side notch of upper cutout-   734 opening-   736 flexible cantilever tab-   810 element-   811 cover-   813 cover-   815 rear portion-   821 aperture-   824 tray-   825 divider-   827 trough-   829 trough-   838 U-shaped radius limiter-   858 hinge-   876 S-shaped pathway-   878 upper level-   880 lower level-   884 portion of S-shaped pathway-   890 top surface of element-   892 bottom surface of element-   894 right side of element-   896 left side of element-   897 opening-   900 mounting system-   901 first locking feature-   902 stud-   903 second locking feature-   904 slot-   905 third locking feature-   906 slide lock-   908 stem portion-   910 flange portion-   912 receiver portion-   914 retention portion-   916 end surface-   918 cantilever arm-   920 stop surface-   922 flex surface-   924 lower front edge-   956 frame member-   957 opening-   960 middle portion-   962 opening-   964 side portion-   970 radius limiter-   1056 frame member-   1156 frame member-   1160 middle portion-   1256 frame member-   1260 center portion-   1261 front portion-   1263 splice region-   1265 cover-   1356 frame member-   1357 flip-tray-   1359 radius limiter-   1361 right side-   1363 left side-   1387 splitter-   1456 frame member-   1457 flip-tray-   1458 splice region-   1459 radius limiter-   1460 center portion-   1556 base portion-   1560 middle portion-   1562 opening-   1564 side portion-   1569 modular element-   1570 radius limiter-   1590 hook-   1591 first side-   1592 first edge-   1593 catch-   1594 second side-   1595 second edge-   1656 frame member-   1669 modular element-   1671 splice region-   1756 frame member

What is claimed is:
 1. A telecommunications rack comprising: at least two pieces of telecommunications equipment; an interlocking arrangement between the two pieces of telecommunications equipment, wherein the interlocking arrangement allows the two pieces of telecommunications equipment to be selectively mountable to each other with a sliding motion between the two pieces of telecommunications equipment, wherein the interlocking arrangement is defined by a first locking feature located on a first of the two pieces of telecommunications equipment and a second locking feature located on a second of the two pieces of telecommunications equipment, wherein the first locking feature is defined by a plurality of studs and the second locking feature is defined by a plurality of slots, the interlocking arrangement further including a third locking feature in the form of cantilever arms provided on the second of the two pieces of telecommunications equipment that are configured to abut the studs to prevent relative sliding between the two pieces of telecommunications equipment; and a mounting arrangement for directly mounting only one of the two pieces of telecommunications equipment to the telecommunications rack, wherein the second of the two pieces of telecommunications is mounted to the telecommunications rack only via the interlocking arrangement between the two pieces of telecommunications equipment.
 2. A telecommunications rack according to claim 1, wherein the first locking feature is located at a top surface of the first of the two pieces of telecommunications equipment and the second locking feature is located at a bottom surface of the second of the two pieces of telecommunications equipment.
 3. A telecommunications rack according to claim 1, wherein the two pieces of telecommunications equipment include optical fiber distribution elements.
 4. A telecommunications rack according to claim 1, wherein the two pieces of telecommunications equipment include one with optical fiber distribution elements, and another with different equipment.
 5. A telecommunications rack according to claim 1, wherein more than two pieces of telecommunications equipment are provided in a stack, and an interlocking arrangement is provided between each pair of telecommunications equipment that are provided on the telecommunications rack.
 6. A telecommunications rack according to claim 1, wherein each piece of telecommunications equipment is defined by an optical fiber distribution element comprising a chassis defining a top surface and a bottom surface, the chassis further defining an interior region defined between the top surface and the bottom surface, wherein the optical fiber distribution element further comprises a movable tray slidably movable from within the chassis to a position at least partially outside the chassis, the movable tray defining fiber optic connection locations, the optical fiber distribution element further comprising a slide mechanism which connects the movable tray to the chassis, wherein the slide mechanism includes a radius limiter which moves with synchronized movement relative to the chassis and the tray during slidable movement of the tray, the radius limiter configured to manage cables leading to or from the fiber optic connection locations of the movable tray, wherein the first locking feature in the form of a plurality of studs extends from the top surface of the chassis, each stud defining a stem portion and a flange portion having a larger profile than the stem portion, wherein the larger flange portion is positioned on the stud such that the entirety of the flange portion is spaced apart from the top surface of the chassis and such that the stem portion of the stud is located between the top surface of the chassis and the flange portion of the stud.
 7. A telecommunications rack according to claim 6, wherein the second locking feature in the form of a plurality of slots is provided at the bottom surface of the chassis.
 8. A telecommunications rack according to claim 7, wherein each slot defines a receiver portion and a retention portion, wherein the receiver portion is sized to accommodate the flange portion of each stud and the retention portion is sized to accommodate the stem portion but not the flange portion of each stud.
 9. A telecommunications rack according to claim 6, wherein each tray includes at least one hingedly mounted frame member which hinges about an axis perpendicular to the direction of movement of the movable tray. 